Motor for dispensing pumps



July 13, 1926. 4 1,591,956 I R. E. BECHTOLD MOTOR FOR DISPENSING PUMPSFiled may 15. 1.921 5 sheets-sheet 1 5 Sheets-Sheet 2 5mg W 17296 MZM R.E. BECHTOLD MOTOR FOR DISPENSING PUMPS Filed ma 13, 1921 R. E. BECHTOLDMOTOR FOR DISPENSING PUMPS I Fi led May 15. 1921 5' Sheets-Sheet s July13 1926.

v R. E.'BECHTOLD MOTOR FOR DISPENSING PUMPS 5 Sheets-Sheet 4 Filed May13/ 1921 m IHIH if. X

uummm LUIHHHHi KQZZ765 i 2277 52 July 13 1926. 1,591,956

R. E. BECHTOLD MOTOR FOR DISPENING PUMPS Filed May 13. 1921 5Sheets-Shea! 5 of Fig. 6

Patented July 13, 192$.

stares PATENT orlncs.

REUBEN E. nnonz onn, or WAYNE. INDIANA, AssIG No-R' TO s. F. BOWSE'R'caCOMPANY, INQ, F FORT "WAYNE,

INDIANA, A CORPORATION OF INDIANA.

MOTOR FOR DISPENSING PUMPS.

Application filed May 13,

.3 commodities.

The invention has for its object the provision of mechanism of the classnamed which shall be of improved construction and operation. It isexemplified in the combinal tion and arrangement of parts shown in theaccompanying drawings and described in the following specification, andit is more particularly pointed out in" the appended claims.

1n the drawings Fig. 1 isan elevation, with parts broken away, of amotor embodying one form of the present invention;

Fig. 2 is a vertical section-of the motor shown in Fig. 1;

Fig. 3 is an elevation looking from the right'in Fig. 1' with parts insection;

Fig. 4 is a horizontal section on line 4-4 of Fig. 2;

5 Fig; 5 is a-horizontal section on line 5-5 of Fig. 2';

Fig. 6 is a fragmentary horizontal section showing the valveconstruction; 7 7 Fig. 7 is a. vertical section on-line 7+7 Fig. 8 is abottom plan of the valve; and Fig. 9 is a fragmentary section on line9-9 of Fig. 5.

Piston type pumps for'disp'ensing gasoline usually comprise a: plungerworking in a cylinder which is connected with gearing provided with acrank handleto'be operated by hand. These pumps are practically all madesingle acting, that is, they are made to to take the place of ahandcrank for opera atingi pumps of the character mentioned above. In Figs.1 and 2 there isshow'n a motor having a base casting 1 0' provided witha bracketll by means of which the motormay be secured to the casing'of apump tobeoperated; The motor is provided with a cylinder 12 in which apiston 13 is arranged to reciprocate'the piston having a rectangular rodi l secured thereto and provided with rack teeth- 15 formed directlydischargeliquid on the upward stroke only and require the plunger tobe'returned to its 1921. Serial No. 469,155.

thereon. The cylinder 12 is provided with an air-tight connection with atop casting 16 having. flanges 17 for receiving the up per end of thecylinder. A similar connection isprovided' between the lower cast-inglOand the lower end ofthe cylinder, and the two castings are: securedtogether bystay; rods. 18. The motorrack 1% extends through an opening.19 in the upper casting. 16 and a pair of packing plates 20 and 21 areprovided with: openings which closely fit the rack' bar 14. Thepacking.plates 20- and 21 have their faces.- ground to fit one another closely,and the plate 21' has its upper face accurately fitted to a flange 22extending downwardly from the casting 16. A retaining plate 23 issecured to the casting 16 and is provided with-recesses; containingsprings 24' which bear against the lower face of the:

plate 20 and force theplates 20 and 21 into contact with one another,and the: upper plate 21: against the flange 22. The plates 20 and 21 arefree to move laterally, except fortheir'engagement with the rack bar 14.

The teeth 15 mesh. with the teeth ofa:pin-- ion 26 splined on a shaft 27journaled in the castingf16. A second gear28 is secured to the shaft'27- an'dmeshes with a pinion 29 fastened OI1 a-Sl121f'h'30. fineen'd'of'the shaft 30- is provided with' a coupling member 31 bymeansofwhich' it may be coupled with theshat'tof aliquid dispensingpump. The opposite endiof'the shaft 30 is providedwith akeyway' 32 by'means of which ahand:

crank'may beattacheditothe'shaft to op erate'thei motor and pump in caseof failure of theair pressure] Normally the endof th'e shaft bearingthexkeyway82 is en'closed in a removable cap 33 threaded':into a coverplate 3ft secured to the casting16'by screws35. The casting 16 is:"proi'id'ed.with oil cham-v hers 36 and oil rings-'37 to supply lubricanttothe shafts 27 andi30i fromthese chambers.

U-washers' 38 enter grooves in" the shafts-27 and 30 and hold theseshafts":against longitud n'al movement.

erly'in mesh with the pinion 26;

lower casting 10.

A; cap" 39 closes the bearing o'pen'ing fat one'en'd 0 f the s'ha'ft27 Aroller 40 is' jo'urnaledon the shaft opposite therac'k' 14 to holdthe1rack2pro p=- $3 in the casting 16. the port i8 being arranged toregister with an opening 4% in a valve seat =15. A similar opening l6registers with the upper end of the pipe 11. A \tllVQ 1-? rests upon anoutwardly cx'lendii ed on the valve seat l5, and (lit and seat are heldin place by bolts upon the upper face of the valve seat t5 and isprovided with a valve stem 51 extending through a packing gland 52 inthe casing 47. The valve is held against rotation relative to the stem51, but is tree to slide in the direction of the axis of the stem and isresiliently held upon its seat by a compression spring 53. The valve isoscillated about the axis ot its stem 51 by a handle 51- secured to theupper end of the stem. As shown in Figs. 2 and 5, the handle 51 isprovided with lateral y extending lugs which bear against stops 56 on ahorizontally sliding head The plunger 6'? is seated in a 3555 in aprojection of the lever 66 and llitr; its op :ite end slidably mountedin a bracket. on the casin 97., as shown in The l (T Figs. 52 and mad 5connected with a rod 58 slidably mounted in the controller casing 97 andsurrounded by a coil ring 59 which normally presses the head 57 to theright as viewed in these figures, and thus retains the handle 5% incentral position.

A brake 60 is arranged to bear upon the periphery of the pinion 29, asshown in .l I 2. the brake being supported by a pair otlinks 61 whichare carried on a member pivoted on a cross-rod 63 supported by thecasting 16. The member 62 is provided with an adjusting screw 64. thelower end of which bears upon a ledge 65 projecting from a lever arm 66.The lever arm 66 engages the end of a. plunger 67 resiliently pressed tothe right by a spring 68, as shown in Fig. A pair of links 69 arepivotally connected to opposite sides of the brake member 66. theopposite ends of the links being; pivoted upon a cross-rod '70 supportedby the casting 16. It will be seen that the eXpai ion or" the spring 68will tend to exert lifting force on the link 61 and that this force willcooperate with the links 69 to press the brake 60 into engagement withthe pinion 29 and thus resist downward movement of the rack 1 1. Arelease bar 71 is slidably mounted in the casing 97 of the controlmechanism in position to engage one of the shoulders 55 on the handlever 54- when the lever is swung in a clockwise direction. as viewed inFig. 5. This release bar 71 bears against a projecting arm 72 on thelever 66 in position to compress the spring 68 and lower the brake 60 soas to permit downward movement of the rack 1 under the control of thevalve mechanism in a manner to be explained.

T he operation of the valve mcchai'iism will best be understood fromFigs. 2, 6, 7 and 8. The valve seat %5, as shown in Fig. T, is providedwith a port 73 communicating with a pipe 75 through a cored opening 76in the casting 16. The pipe '75 is provided with a coupling 77 orconnection with any suitable source of compressed air or other actuatingfluid. The opening 73 in the valve seat 45 communicates with theinterior of the casing 17 so that the interior of the casing isconstantly supplied with fluid under pressure. This will assist thespring 56 in holding the valve 50 upon its seat. :1 port 1'8 in thevalve seat 45 registers with a cored opening 79 in the casting 16, whichin turn connected with a discharge pipe St) having a muffler 81connected therewith for deadening the noise caused by the discharge ofthe air from the motor. The port TS opens upwardly through the valveseat 45 is communication with an arc-shaped groove 82 on the lower faceof the valve 50. The valve 56 is cut away at one side and notched toprovide inlet ports 83 and 84, res 'iectively. hen the handle 514. ismoved to shift the valve 50 in a counter-clockwise direction, as viewedin Fig. 6, the port 83 will be brought into registration with the port416 in the valve seat -15. At the same time the groove 82 will be movedaway from the port 46 but will remain in registration with the port-1-il-. is will connect the lower end of the cylinder 12 with the sourceof compressed air, while the upper end of the cylinder is open to theatmosphere and the piston 13 will be caused to rise in the cylinder tooperate the pump. The upward in vement oi" the piston will rotate thepinion 29 in a clockwi e direction. as viewed in Fig. 2, so that therotaion of the pinion will automatically rele f the brake 60 due to therelative angle of the link 69. It at any time during the upward movementof the piston the handle 54 is released. it will automatically bebrought to a central position by the spring 59 and the groove 82 in thevalve 50 will then connect both the upper and lower ends of the cylinderwith the discharge port 78. The piston will then come to rest and beheld against downward movement by the brake 60. If the handle 51' isagain operated to raise the piston the motion will continue from thepoint where it was arrested until the upper end of the stroke isreached. or until it is again checked by release of the handle. Insteadof continuing the upward movement the piston may be returned to itslowermost position by moving the lever 5- in the opposite direction.This movement will rotate the valve 50 in a clockwise direction, asviewed in Fig. 6, and will bring the port 8% into registration with theport 4-1; which communicates with the upper end of the cylinder. At thesame time the port l6 will remain in communication with-the dis chargeou tlct'andthe piston will be positively moved downward under-thepressure of the air in the upper end of the cylinder. The samemovement-ofthe handle 54 which operates the valve 50 for a downwardmovement of the piston will also bring the lower portion of theshoulderfif) into contact with the outer end of the brake, releaserod=71 and move the lever 66 ina direction to release the brake 60.

Ina. ,deviceof thischaracter it is desirable that the piston shall bereturned to its extreme downward position after each operation so thaton a subsequent operation a full stroke will be made to deliver fullmeasure of liquid. For this reason interlocking mechanism is provided toprevent shifting the lever 54 to a raising position after it has oncebeen moved to lower the piston until the piston has reached its extremedownward position. This mechanism is shown in Figs. 2, 5 and 9 andcomprises a bar 85 mounted to slide in notches 85 formed in brackets 86and 87 in the control casing 97. The bar 85' is provided with ahead 88having a transverse groove 89 therein in which an upwardly projectingstud or roller 90 carried on the lever 54 is arranged to travel. The bar85 is provided with an opening in which a pin 91 is slidably mounted inposition to bear against the face of the rack 14. A spring normallypresses the pin 91 into contact with the rack. As shown in Fig. 9, theface of the rack 14 is provided with a notch 93 in position to beengaged by the end of the pin 91 when the rack is in its lowermostposition. When the lever 54 is moved to admit fluid to the cylinder forraising the rack, the beveled edge of the notch 93 will permit the rackto raise and force the pin out of the notch. WVhen the lever 54 is movedin a clockwise direction, as viewed in Fig. 5, to cause a lowering ofthe rack, the pin 91 will be drawn to the right in Fig. 5 until itpasses the edge of the rack 14 and will then be pressed by the spring 92past the corner of the rack so that the bar 85 will be locked againstreturn movement. This prevents the lever 54 being moved in a directionto raise the rack; however, it does not hold the valve 50 in position tosupply fluid to the cylinder to lower the rack. In order to lower therack it will be necessary to hold the lever 54 and when the rack comesto its lowermost position the notch 93 again comes opposite the pin 91.The lever 54 may then be returned to neutral position and be operatedfor again raising the rack. lhe brake 60 may be so regulated by theadjusting screw 64 that the brake will not be released by the movementof the lever 54 for lowering the rack until after the pin 91 has passedthe edge of rack 14 and locked the lever against return movement. Anadjusti ng screw -94-is provided ior limiting the movement of the lever54 to-control the amount of openingof the port :tor ilOWGI- ing-therack, :thus controliling :the speed of lowering. Any lower speeds canbe-obtained by opening or closing valve .50. more .or lless' by means oithe .control 1everu54. A cap 95 is secured to the upper ended the rack14 and provides a weather shield for the rack and ator its passage intothe cover for the motor. casing-96zis=carried by the upper and lowercastings 1'0 and 116 and encloses the cylinder and other parts between.the two castings.

I claim 1. A motor comprising a cylinder and a piston arranged toreciprocate therein, a hand operated valve for selectively admittingfluid under pressure to opposite ends of said cylinder, and a lock forpositively preventing movement of said valve in a direction to producereversal of said piston during movement thereof in one direction.

2. A motor comprising a cylinder having a reciprocating piston therein,hand controlled means for selectively admitting fluid under pressure toopposite ends of said cylinder to move said piston in oppositedirections, and means for automatically locking said hand controlledmeans to prevent reversal thereof during movement of said piston in onedirection.

3. A motor for a liquid dispensing pump comprising a cylinder having areciprocating piston therein, a reciprocating rack operated by saidpiston, hand actuated means for controlling the movement of said pistonand rack, and locking means for said hand actuated means to retain saidhand actuated means in the position to which it has been moved when saidmeans is actuated to cause reciprocation of said piston and rack in onedirection.

4. A motor comprising a cylinder having a reciprocating piston therein,a rack connected with said piston, a valve for controlling the admissionof fluid under pressure to opposite ends of said cylinder to reciprocatesaid rack, a hand lever for controlling said valve, a lock for holdingsaid hand lever to prevent reversal of said piston when said piston ismoving in one direction but permitting reversal of said piston when saidpiston is moving in the opposite direction, and means for automaticallymoving said hand lever to a neutral position and connecting oppositeends of said cylinder to atmosphere when said hand lever is released.

5. A motor comprising a cylinder having a reciprocating piston therein,valve mecha nism for controlling said piston and a lever for shiftingsaid valve mechanism, resilient means for holding said hand lever inneutral position in which both ends of said cylinder are incommunication with the atmosphere,

a brake for preventing accidental return movement of said piston butinoperable to prevent forward movement thereof, resilient means normallyholding said brake in operative position, and mechanism forautomatically releasing said brake when said hand lever is actuated toproduce the return movement of said piston.

6. A motor comprising a reciprocating rack, hand actuated mechanism forcontrolling the movement of said rack, and means for preventing reversalof said control mechanism during the movement of the rack -in onedirection, said means comprising an automatically actuated lock forholding said control mechanism in fixed position when it has beenactuated to produce movement of said rack in said direction and toretain said hand actuated mechanism in said position until the limit ofmovement of the rack in said direction has been reached.

In testimony whereof I have signed my name to this specification on this7th day of May, 1921.

REUBEN E. BECHTOLD.

